View Filing Data

Document and Entity Information - USD ($)	9 Months Ended
Document and Entity Information - USD ($)	Sep. 30, 2010	Oct. 29, 2010	Jun. 30, 2009
Document and Entity Information [Abstract]
Entity Registrant Name	WESCO INTERNATIONAL INC
Entity Central Index Key	0000929008
Document Type	10-Q
Document Period End Date	Sep. 30, 2010
Amendment Flag	false
Document Fiscal Year Focus	2010
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 1,023,200,000
Entity Common Stock, Shares Outstanding		42,483,028

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2010	Dec. 31, 2009
Current Assets:
Cash and cash equivalents	$ 103,120	$ 112,329
Trade accounts receivable, net of allowance for doubtful accounts of $18,589 and $20,060 in 2010 and 2009, respectively	796,370	635,754
Other accounts receivable	23,175	31,808
Inventories, net	551,982	507,215
Current deferred income taxes	1,653	1,686
Income taxes receivable	23,006	29,135
Prepaid expenses and other current assets	18,506	13,077
Total current assets	1,517,812	1,331,004
Property, buildings and equipment, net	114,364	116,309
Intangible assets, net	75,790	81,308
Goodwill	876,533	863,410
Investment in subsidiary	0	43,957
Deferred income taxes	37,655	33,518
Other assets	13,105	24,687
Total assets	2,635,259	2,494,193
Current Liabilities:
Accounts payable	574,918	453,154
Accrued payroll and benefit costs	51,683	30,949
Current portion of long-term debt	96,673	93,977
Bank overdrafts	25,645	32,191
Current deferred income taxes	7,959	7,301
Other current liabilities	77,966	63,262
Total current liabilities	834,844	680,834
Long-term debt, net of discount of $178,959 and $182,689 in 2010 and 2009, respectively	483,646	597,869
Deferred income taxes	190,779	191,068
Other noncurrent liabilities	30,693	28,133
Total liabilities	$ 1,539,962	$ 1,497,904
Commitments and contingencies
Stockholders' Equity:
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding	$ 0	$ 0
Common stock	561	560
Additional capital	1,005,730	992,855
Retained earnings	662,853	582,199
Treasury stock, at cost; 17,897,360 and 17,890,459 shares in 2010 and 2009, respectively	(590,602)	(590,353)
Accumulated other comprehensive income	16,712	10,985
Total stockholders' equity	1,095,297	996,289
Total liabilities and stockholders' equity	2,635,259	2,494,193
Class B nonvoting convertible common stock
Stockholders' Equity:
Common stock	$ 43	$ 43

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Sep. 30, 2010	Dec. 31, 2009
Current Assets:
Allowance for doubtful accounts	$ 18,589,000	$ 20,060,000
Liabilities and Stockholders' Equity
Long-term debt, discount	178,959,000	182,689,000
Stockholders' Equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	210,000,000	210,000,000
Common stock, shares issued	56,060,026	55,967,824
Common stock, shares outstanding	42,502,097	42,416,796
Treasury stock, shares	17,897,360	17,890,459
Class B nonvoting convertible common stock
Stockholders' Equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	4,339,431	4,339,431
Common stock, shares outstanding	0	0

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2010	Sep. 30, 2009
Condensed Consolidated Statements of Income (Unaudited) [Abstract]
Net sales	$ 1,324,555	$ 1,152,427	$ 3,732,275	$ 3,491,232
Cost of goods sold (excluding depreciation and amortization below)	1,066,769	931,536	3,004,121	2,808,296
Selling, general and administrative expenses	190,577	168,309	559,592	525,658
Depreciation and amortization	5,963	6,410	17,684	19,926
Income from operations	61,246	46,172	150,878	137,352
Interest expense, net	13,748	13,599	41,678	39,949
Gain on debt exchange		(5,961)		(5,961)
Other income		(1,391)	(4,284)	(4,118)
Income before income taxes	47,498	39,925	113,484	107,482
Provision for income taxes	13,837	6,306	32,830	24,147
Net income	$ 33,661	$ 33,619	$ 80,654	$ 83,335
Earnings per share:
Basic	$ 0.79	$ 0.8	$ 1.9	$ 1.97
Diluted	$ 0.74	$ 0.79	$ 1.79	$ 1.95

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2010	Sep. 30, 2009
Operating Activities:
Net income	$ 80,654	$ 83,335
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	17,684	19,926
Amortization of debt issuance costs	1,982	2,862
Amortization of debt discount	3,730	10,556
Deferred income taxes	(4,551)	5,413
Stock-based compensation expense	11,452	9,787
Gain on debt exchange		(5,961)
Gain on sale of property, buildings and equipment	(263)	(308)
Asset impairment charge	3,793
Equity income, net of distributions in 2010 and 2009 of $1,864 and $4786, respectively	(2,421)	668
Excess tax benefit from stock-based compensation	(713)	(197)
Interest related to uncertain tax positions	551	863
Changes in assets and liabilities
Trade and other receivables, net	(149,569)	148,858
Inventories, net	(40,859)	117,086
Prepaid expenses and other current assets	3,352	(8,577)
Accounts payable	118,350	(69,698)
Accrued payroll and benefit costs	20,624	(21,413)
Other current and noncurrent liabilities	11,701	(2,346)
Net cash provided by operating activities	75,497	290,854
Investing Activities:
Capital expenditures	(10,123)	(10,505)
Acquisition payments	(14,344)	(214)
Proceeds from sale of subsidiary	40,000
Equity distribution	4,054	1,328
Collection of note receivable	15,000
Proceeds from sale of assets	925	111
Net cash provided (used) by investing activities	35,512	(9,280)
Financing Activities:
Proceeds from issuance of long-term debt	716,474	305,700
Repayments of long-term debt	(830,798)	(545,458)
Debt issuance costs	(2,049)	(13,261)
Proceeds from the exercise of stock options	742	312
Excess tax benefit from stock-based compensation	713	197
Repurchase of common stock	(249)	(30)
Decrease in bank overdrafts	(6,545)	(11,122)
Payments on capital lease obligations	(1,234)	(1,500)
Net cash used by financing activities	(122,946)	(265,162)
Effect of exchange rate changes on cash and cash equivalents	2,728	8,595
Net change in cash and cash equivalents	(9,209)	25,007
Cash and cash equivalents at the beginning of period	112,329	86,338
Cash and cash equivalents at the end of period	103,120	111,345
Non-cash investing and financing activities:
Property, buildings and equipment acquired through capital leases	$ 285	$ 805

Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2010	Sep. 30, 2009
Adjustments to reconcile net income to net cash provided by operating activities:
Equity method investment distributions	$ 1,864	$ 4,786

Organization	9 Months Ended
Organization	Sep. 30, 2010
Organization [Abstract]
ORGANIZATION	1. ORGANIZATION WESCO International, Inc. and its subsidiaries (collectively, “WESCO”), headquartered in Pittsburgh, Pennsylvania, is a full-line distributor of electrical construction products and electrical and industrial maintenance, repair and operating (“MRO”) supplies and is a provider of supply chain services used primarily in the industrial, construction, utility and commercial, institutional and government markets. We serve over 100,000 customers globally, through approximately 380 full service branches and seven distribution centers located primarily in the United States, Canada, and Mexico, with additional locations in the United Kingdom, Singapore, China, Australia, Africa and the United Arab Emirates.

Accounting Policies	9 Months Ended
Accounting Policies	Sep. 30, 2010
Accounting Policies [Abstract]
ACCOUNTING POLICIES	2. ACCOUNTING POLICIES Basis of Presentation The unaudited condensed consolidated financial statements of WESCO have been prepared in accordance with Rule 10-01 of Regulation S-X of the Securities and Exchange Commission (the “SEC”). The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in WESCO’s 2009 Annual Report on Form 10-K filed with the SEC. The December 31, 2009 condensed consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States. The unaudited condensed consolidated balance sheet as of September 30, 2010, the unaudited condensed consolidated statements of income for the three and nine months ended September 30, 2010 and 2009, respectively, and the unaudited condensed consolidated statements of cash flows for the nine months ended September 30, 2010 and 2009, respectively, in the opinion of management, have been prepared on the same basis as the audited consolidated financial statements and include all adjustments necessary for the fair statement of the results of the interim periods. All adjustments reflected in the unaudited condensed consolidated financial statements are of a normal recurring nature unless indicated. Results for the interim periods presented are not necessarily indicative of the results to be expected for the full year. Recent Accounting Pronouncements Pronouncements issued by the Financial Accounting Standards Board (the “FASB”) or other authoritative accounting standards groups with future effective dates are either not applicable or are not expected to be significant to WESCO’s financial position, results of operations or cash flows.

Stock Based Compensation

9 Months Ended

Sep. 30, 2010

Stock-Based Compensation [Abstract]

STOCK-BASED COMPENSATION

3. STOCK-BASED COMPENSATION

WESCO’s stock-based employee compensation plans are comprised of stock options, stock-settled stock appreciation rights and restricted stock units. Compensation cost for all stock-based awards is measured at fair value on the date of grant, and compensation cost is recognized, net of estimated forfeitures, over the service period for awards expected to vest. The fair value of stock options and stock-settled appreciation rights is determined using the Black-Scholes valuation model. The fair value of restricted stock units is determined by the grant-date closing price of WESCO’s common stock. The forfeiture assumption is based on WESCO’s historical employee behavior that is reviewed on an annual basis. No dividends are assumed.

During the three and nine month periods ended September 30, 2010 and 2009, WESCO granted the following stock-settled stock appreciation rights and restricted stock units at the following weighted average assumptions:


	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2010			2009			2010			2009

Stock-settled appreciations rights granted		684,949			801,531			708,949			803,231
Restricted stock units		153,318			245,997			153,318			245,997
Risk free interest rate		1.8	%		2.3	%		1.8	%		2.3	%
Expected life	5.0 years			4.5 years			5.0 years			4.5 years
Expected volatility		49	%		51	%		49	%		51	%

For the three and nine months ended September 30, 2010, the weighted average fair value per stock-settled appreciation right granted was $14.69 and $14.71, respectively. For the three and nine months ended September 30, 2009, the weighted average fair value per stock-settled appreciation right granted was $11.15 and $13.65, respectively. For the three and nine months ended September 30, 2010 and 2009, the weighted average fair value per restricted stock unit granted was $33.05 and $25.37, respectively.

WESCO recognized $4.3 million and $3.5 million of non-cash stock-based compensation expense, which is included in selling, general and administrative expenses, for the three months ended September 30, 2010 and 2009, respectively. WESCO recognized $11.5 million and $9.8 million of non-cash stock-based compensation expense, which is included in selling, general and administrative expenses, for the nine months ended September 30, 2010 and 2009, respectively. As of September 30, 2010, there was $23.4 million of total unrecognized compensation cost related to non-vested stock-based compensation arrangements for all awards previously made, of which approximately $4.3 million is expected to be recognized over the remainder of 2010, $11.4 million in 2011, $5.8 million in 2012 and $1.9 million in 2013.

During the nine months ended September 30, 2010 and 2009, the total intrinsic value of awards exercised was $2.2 million and $0.6 million, respectively, and the total amount of cash received from the exercise of options was $0.7 million and $0.3 million, respectively. The tax impact associated with the exercise of awards for the nine months ended September 30, 2010 and 2009 was a benefit of $0.6 million and a detriment of $0.1 million, respectively, and was recorded to additional capital.

The following table sets forth a summary of stock options and stock-settled stock appreciation rights and related information for the nine months ended September 30, 2010:


				Weighted		Weighted Average		Aggregate
				Average		Remaining		Intrinsic
				Exercise		Contractual Term		Value
	Awards			Price		(In Years)		(In Thousands)
Outstanding at December 31, 2009		4,226,153		$	35.30
Granted		708,949			33.19
Exercised		(115,043	)		16.01
Forfeited		(90,417	)		41.59

Outstanding at September 30, 2010		4,729,642			35.33		6.7	$	27,273

Exercisable at September 30, 2010		3,221,554			36.99		5.6	$	21,393

The following table sets forth a summary of restricted stock units and related information for the nine months ended September 30, 2010:


				Weighted
				Average
				Fair
	Awards			Value
Unvested at December 31, 2009		243,942		$	25.37
Granted		153,318			33.05
Vested		(675	)		25.37
Forfeited		(3,085	)		25.37

Unvested at September 30, 2010		393,500		$	28.36

Earnings Per Share

9 Months Ended

Sep. 30, 2010

Earnings Per Share [Abstract]

EARNINGS PER SHARE

4. EARNINGS PER SHARE

Basic earnings per share are computed by dividing net income by the weighted average common shares outstanding during the periods. Diluted earnings per share are computed by dividing net income by the weighted average common shares and common share equivalents outstanding during the periods. The dilutive effect of common share equivalents is considered in the diluted earnings per share computation using the treasury stock method, which includes consideration of stock-based compensation and convertible debt.

The following table sets forth the details of basic and diluted earnings per share:


	Three Months Ended
	September 30,
Amounts in thousands, except share and per share data	2010		2009
Net income reported	$	33,661	$	33,619

Weighted average common shares outstanding used in computing basic earnings per share		42,491,186		42,278,729
Common shares issuable upon exercise of dilutive stock options		795,649		479,142
Common shares issuable from contingently convertible debentures (see note below for basis of calculation)		2,237,606		—

Weighted average common shares outstanding and common share equivalents used in computing diluted earnings per share		45,524,441		42,757,871


Earnings per share:
Basic	$	0.79	$	0.80
Diluted	$	0.74	$	0.79


	Nine Months Ended
	September 30,
Amounts in thousands, except share and per share data	2010		2009
Net income reported	$	80,654	$	83,335

Weighted average common shares outstanding used in computing basic earnings per share		42,470,820		42,264,440
Common shares issuable upon exercise of dilutive stock options		728,706		381,175
Common shares issuable from contingently convertible debentures (see note below for basis of calculation)		1,981,055		__

Weighted average common shares outstanding and common share equivalents used in computing diluted earnings per share		45,180,581		42,645,615


Earnings per share:
Basic	$	1.90	$	1.97
Diluted	$	1.79	$	1.95

For the three months ended September 30, 2010 and 2009, the computation of diluted earnings per share excluded 2.5 million and 3.3 million, respectively, of stock-settled stock appreciation rights at weighted average exercise prices of $47 per share and $42 per share, respectively. For the nine months ended September 30, 2010 and 2009, the computation of diluted earnings per share excluded 2.5 million and 3.7 million, respectively, of stock-settled stock appreciation rights at weighted average exercise prices of $47 per share and $40 per share, respectively. These amounts were excluded because their effect would have been antidilutive.

Because of WESCO’s obligation to settle the par value of the 2.625% Convertible Senior Debentures due 2025 (the “2025 Debentures”), the 1.75% Convertible Senior Debentures due 2026 (the “2026 Debentures”) and the 6.0% Convertible Senior Debentures due 2029 (the “2029 Debentures” and together with the 2025 Debentures and 2026 Debentures, the “Debentures”) in cash, WESCO is not required to include any shares underlying the Debentures in its diluted weighted average shares outstanding until the average stock price per share for the period exceeds the conversion price of the respective Debentures. At such time, only the number of shares that would be issuable (under the treasury stock method of accounting for share dilution) would be included, which is based upon the amount by which the average stock price exceeds the conversion price. The conversion prices of the 2029 Debentures, 2026 Debentures and 2025 Debentures are $28.87, $88.15 and $41.86, respectively. Share dilution is limited to a maximum of 11,951,939 shares for the 2029 Debentures, 2,507 shares for the 2026 Debentures and 2,205,434 shares for the 2025 Debentures. Since the average stock prices for the three and nine month periods ended September 30, 2010 were $35.51 per share and $34.60 per share, respectively, 2,237,606 shares and 1,981,055 shares, respectively, underlying the 2029 Debentures were included in the diluted share count. The effect of the 2029 Debentures on diluted earnings per share was a decrease of approximately $0.04 and $0.08, respectively. There was no impact of the Debentures on diluted earnings per share for the three and nine month periods ended September 30, 2009.

Revolving Credit Facilty	9 Months Ended
Revolving Credit Facilty	Sep. 30, 2010
Revolving Credit Facilty [Abstract]
REVOLVING CREDIT FACILTY	5. REVOLVING CREDIT FACILITY At September 30, 2010, the aggregate borrowing capacity under the revolving credit facility was $375 million. The revolving credit facility consists of two separate sub-facilities: (i) a U.S. sub-facility and (ii) a Canadian sub-facility and includes a letter of credit sub-limit of up to $55 million. The facility matures on November 1, 2013 and is collateralized by the inventory of WESCO Distribution, Inc. (“WESCO Distribution”) and the inventory and accounts receivable of WESCO Distribution Canada, L.P. WESCO Distribution’s obligations under the revolving credit facility have been guaranteed by WESCO International, Inc. (“WESCO International”) and by certain of WESCO Distribution’s subsidiaries. On February 19, 2010, WESCO Distribution, along with certain of its subsidiaries, entered into a Limited Consent and Amendment No. 4 (the “Amendment”) to its Third Amended and Restated Revolving Credit Agreement, dated November 1, 2006 (the “Agreement”). The Amendment permits WESCO to complete certain legal entity restructuring actions, issue additional surety bonds and invest additional resources in foreign subsidiaries. In addition, the Amendment enhances WESCO’s hedging capacities. Pursuant to the terms of the Amendment, WESCO agreed to modify the Applicable Margins (as defined in the Agreement) paid to the lenders on borrowings and letters of credit. Availability under the facility is limited to the amount of eligible U.S. and Canadian inventory and Canadian receivables applied against certain advance rates. Depending upon the amount of excess availability under the facility, interest will be calculated at LIBOR plus a margin that ranges between 2.25% and 2.875% or at the Index Rate (prime rate published by the Wall Street Journal) plus a margin that ranges between 1.00% and 1.625%. This change represented a 1.125% to 1.25% adjustment in borrowing margin over the previous rates. The fee for unused capacity associated with the facility was not changed and will range between 0.25% and 0.375%. At September 30, 2010, the interest rate on borrowings under this facility was approximately 2.7%. As long as the average daily excess availability for both the preceding and projected succeeding 90-day period is greater than $50 million, WESCO is permitted to make acquisitions and repurchase outstanding public stock and bonds. The above permitted transactions also are allowed if such excess availability is between $25 million and $50 million and WESCO’s fixed charge coverage ratio, as defined by Agreement, is at least 1.25 to 1.0 after taking into consideration the permitted transaction. Additionally, if excess availability under the revolving credit facility is less than $60 million, then WESCO must maintain a fixed charge coverage ratio of 1.1 to 1.0. At September 30, 2010 and December 31, 2009, WESCO had $18.0 million and $196.5 million, respectively, outstanding under the facility.

Accounts Receivable Securitization Facility	9 Months Ended
Accounts Receivable Securitization Facility	Sep. 30, 2010
Accounts Receivable Securitization Facility [Abstract]
ACCOUNTS RECEIVABLE SECURITIZATION FACILITY	6. ACCOUNTS RECEIVABLE SECURITIZATION FACILITY On September 7, 2010, WESCO Distribution, Inc. (“WESCO Distribution”) entered into an amendment of its existing accounts receivable securitization facility (the “Receivables Facility”), pursuant to the terms and conditions of the Second Amendment (the “Amendment”) to Third Amended and Restated Receivables Purchase Agreement, dated as of April 13, 2009 (the “Agreement”), by and among WESCO Receivables Corp., WESCO Distribution, the Purchasers and Purchaser Agents party thereto and PNC Bank, National Association, as Administrator. The Amendment lowers the program fee from 3.0% to 1.75%, the commitment fee from 1.0% to 0.75%, and clarifies terms included in the definition of fixed charges. The Amendment also extends the term of the Receivables Facility to September 6, 2013. Substantially all other terms and conditions of the Agreement remain unchanged. Under the Receivables Facility, WESCO sells, on a continuous basis, an undivided interest in all domestic accounts receivable to WESCO Receivables Corp., a wholly owned special purpose entity (the “SPE”). The SPE sells, without recourse, a senior undivided interest in the receivables to third-party conduits and financial institutions for cash while maintaining a subordinated undivided interest in the receivables, in the form of overcollateralization. WESCO has agreed to continue servicing the sold receivables for the third-party conduits and financial institutions at market rates; accordingly, no servicing asset or liability has been recorded. The consolidated balance sheets as of September 31, 2010 and December 31, 2009 reflect $110.0 million and $45.0 million, respectively, of account receivables balances legally sold to third parties, as well as borrowings for equal amounts. At September 31, 2010, the interest rate on borrowings under this facility was approximately 2.6%.

Equity Investment	9 Months Ended
Equity Investment	Sep. 30, 2010
Equity Investment [Abstract]
EQUITY INVESTMENT	7. EQUITY INVESTMENT During the first quarter of 2008, WESCO and Deutsch Engineered Connecting Devices, Inc. (“Deutsch”) completed a transaction with respect to WESCO’s LADD operations, which resulted in a joint venture in which Deutsch owned a 60% interest and WESCO owned a 40% interest. WESCO accounted for its investment in the joint venture using the equity method of accounting. Accordingly, earnings from the joint venture were recorded as other income in the consolidated statement of income. Deutsch was entitled, but not obliged, to acquire the remaining 40% after January 1, 2010. Deutsch paid to WESCO aggregate consideration of approximately $75.0 million, consisting of $60.0 million in cash plus a $15.0 million promissory note for its 60% interest in the joint venture. On January 15, 2010, WESCO received $1.8 million in accrued interest related to the promissory note for the period from January 2, 2008 to January 2, 2010. In addition, Deutsch and WESCO entered into an amended promissory note agreement. The amendment extended the maturity date for the payment of principal and interest to the earlier of (a) the closing date of Deutsch’s option to acquire the remaining 40% joint venture interest or (b) the maturity date of Deutsch’s credit facility or mezzanine financing facility. Interest accrued at a rate of 8.5% compounded annually. Management believed this rate was commensurate with a market rate of interest; therefore, no reserve or allowance was recorded against the promissory note. On April 30, 2010, Deutsch notified WESCO it would exercise its option to purchase the remaining 40% of the LADD joint venture. The option price for Deutsch to acquire the remaining 40% of the joint venture was determined based upon a multiple of trailing earnings, with a minimum purchase price of $40.0 million and maximum purchase price of $50.0 million. The investment in the LADD joint venture at March 31, 2010 was $43.4 million, and the estimated option exercise price was $40.0 million. As a result, WESCO recorded a pre-tax impairment loss of $3.4 million to selling, general and administrative expenses during the first quarter of 2010. On June 7, 2010, WESCO completed the sale of its 40% interest in the LADD joint venture and recorded an additional impairment charge of $0.4 million to selling, general and administrative expenses. WESCO received $40.0 million for its 40% interest plus $15.0 million for the outstanding promissory note and $0.5 million for accrued interest.

Employee Benefit Plans	9 Months Ended
Employee Benefit Plans	Sep. 30, 2010
Employee Benefit Plans [Abstract]
EMPLOYEE BENEFIT PLANS	8. EMPLOYEE BENEFIT PLANS A majority of WESCO’s employees are covered by defined contribution retirement savings plans for their services rendered subsequent to WESCO’s formation. WESCO also offers a deferred compensation plan for select individuals. For U.S. participants, WESCO will make contributions in an amount equal to 50% of the participant’s total monthly contributions up to a maximum of 6% of eligible compensation. For Canadian participants, WESCO will make contributions in an amount ranging from 1% to 7% of the participant’s eligible compensation based on years of continuous service. In addition, employer contributions may be made at the discretion of the Board of Directors. For the nine months ended September 30, 2010 and 2009, WESCO incurred charges of $17.9 million and $7.4 million, respectively, for all such plans. Effective January 1, 2010, WESCO reinstated all discretionary contributions that had been suspended since August 1, 2009 with the exception of a certain group of employees comprised of corporate officers and others. Reinstatement for these employees will be contingent upon WESCO reaching certain financial objectives. Contributions are made in cash to all employee retirement savings plan accounts, except for the deferred compensation plan. Employees then have the option to transfer balances allocated to their accounts into any of the available investment options, including WESCO common stock.

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2010
Commitments And Contingencies [Abstract]
COMMITMENTS AND CONTINGENCIES	9. COMMITMENTS AND CONTINGENCIES WESCO is a co-defendant in a lawsuit filed in a state court in Indiana in which a customer alleges that WESCO sold defective products manufactured or remanufactured by others and is seeking monetary damages in the amount of $52 million. WESCO has denied any liability, believes that it has meritorious defenses and intends to vigorously defend itself against these allegations. Accordingly, no liability is recorded for this matter as of September 30, 2010.

Comprehensive Income

9 Months Ended

Sep. 30, 2010

Comprehensive Income [Abstract]

COMPREHENSIVE INCOME

10. COMPREHENSIVE INCOME

The following tables set forth comprehensive income and its components:


	Three Months Ended
	September 30,
Amounts in thousands	2010		2009
Net Income	$	33,661	$	33,619
Foreign currency translation adjustment		5,901		11,395

Comprehensive income	$	39,562	$	45,014


	Nine Months Ended
	September 30,
Amounts in thousands	2010		2009
Net Income	$	80,654	$	83,335
Foreign currency translation adjustment		5,727		21,400

Comprehensive income	$	86,381	$	104,735

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2010
Income Taxes [Abstract]
INCOME TAXES	11. INCOME TAXES The effective tax rate for the three months ended September 30, 2010 and 2009 was 29.1% and 15.8%, respectively, and the effective tax rate for the nine months ended September 30, 2010 and 2009 was 28.9% and 22.5%, respectively. WESCO’s three and nine month effective tax rates are lower than the federal statutory rate of 35% primarily due to benefits resulting from the recapitalization of Canadian operations, which are partially offset by nondeductible expenses, state taxes and foreign rate differences. The effective tax rate for the nine months ended September 30, 2010 reflects discrete adjustments totaling $1.4 million related to changes in uncertain tax positions and discrete adjustments totaling $0.4 million related to prior years’ taxes. The effective tax rate for the nine months ended September 30, 2009 included a discrete benefit of $1.8 million related to the revaluation of deferred tax items associated with the convertible debt exchange and a discrete benefit of $0.2 million related to prior years’ taxes. The total amount of unrecognized tax benefits was $8.7 million and $8.1 million as of September 30, 2010 and December 31, 2009, respectively. If these tax benefits were recognized in the consolidated financial statements, the portion of these amounts that would reduce WESCO’s effective tax rate would be $7.6 million and $7.1 million, respectively. During the next twelve months, it is reasonably possible that the amount of unrecognized tax benefits will decrease by $1.2 million due to the resolution of federal, state and foreign tax examinations. WESCO records interest related to uncertain tax positions as a part of interest expense in the consolidated statement of income. Penalties are recognized as part of income tax expense. As of September 30, 2010 and December 31, 2009, WESCO had an accrued liability for interest related to uncertain tax positions of $5.0 million and $4.5 million, respectively. A penalty of $0.1 million was recorded during the nine months ended September 30, 2010.

Other Financial Information

9 Months Ended

Sep. 30, 2010

Other Financial Information [Abstract]

OTHER FINANCIAL INFORMATION

12. OTHER FINANCIAL INFORMATION

WESCO Distribution, a wholly owned subsidiary of WESCO International, has outstanding $150.0 million in aggregate principal amount of 7.50% Senior Subordinated Notes due 2017 (the “2017 Notes”), and WESCO International has outstanding $92.3 million in aggregate principal amount of 2025 Debentures, $0.2 million in aggregate principal amount of 2026 Debentures and $345.0 million in aggregate principal amount of 2029 Debentures. The 2017 Notes are fully and unconditionally guaranteed by WESCO International on a subordinated basis to all existing and future senior indebtedness of WESCO International. The Debentures are fully and unconditionally guaranteed by WESCO Distribution on a senior subordinated basis to all existing and future senior indebtedness of WESCO Distribution.

Condensed consolidating financial information for WESCO International, WESCO Distribution and the non-guarantor subsidiaries is as follows:

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEETS


	September 30, 2010
	(In thousands)
							Consolidating
	WESCO		WESCO				and
	International,		Distribution,		Non-Guarantor		Eliminating
	Inc.		Inc.		Subsidiaries		Entries			Consolidated

Cash and cash equivalents	$	2	$	26,929	$	76,189	$	—		$	103,120
Trade accounts receivable, net		—		—		796,370		—			796,370
Inventories, net		—		327,626		224,356		—			551,982
Other current assets		—		6,128		60,212		—			66,340

Total current assets		2		360,683		1,157,127		—			1,517,812
Intercompany receivables, net		—		—		1,728,892		(1,728,892	)		—
Property, buildings and equipment, net		—		39,573		74,791		—			114,364
Intangible assets, net		—		8,033		67,757		—			75,790
Goodwill and other intangibles, net		—		240,313		636,220		—			876,533
Investments in affiliates and other noncurrent assets		1,945,859		3,223,013		41,451		(5,159,563	)		50,760

Total assets	$	1,945,861	$	3,871,615	$	3,706,238	$	(6,888,455	)	$	2,635,259


Accounts payable	$	—	$	397,514	$	177,404	$	—		$	574,918
Other current liabilities		109,131		28,753		122,042		—			259,926

Total current liabilities		109,131		426,267		299,446		—			834,844
Intercompany payables, net		551,680		1,177,212		—		(1,728,892	)		—
Long-term debt		166,262		169,396		147,988		—			483,646
Other noncurrent liabilities		23,242		158,134		40,096		—			221,472
Stockholders’ equity		1,095,297		1,940,606		3,218,957		(5,159,563	)		1,095,297

Total liabilities and stockholders’ equity	$	1,945,612	$	3,871,615	$	3,706,487	$	(6,888,455	)	$	2,635,259


	December 31, 2009
	(In thousands)
							Consolidating
	WESCO		WESCO				and
	International,		Distribution,		Non-Guarantor		Eliminating
	Inc.		Inc.		Subsidiaries		Entries			Consolidated

Cash and cash equivalents	$	3	$	16,924	$	95,402	$	—		$	112,329
Trade accounts receivable, net		—		—		635,754		—			635,754
Inventories, net		—		303,747		203,468		—			507,215
Other current assets		394		18,353		56,959		—			75,706

Total current assets		397		339,024		991,583		—			1,331,004
Intercompany receivables, net		—		—		1,560,850		(1,560,850	)		—
Property, buildings and equipment, net		—		38,819		77,490		—			116,309
Intangible assets, net		—		8,704		72,604		—			81,308
Goodwill and other intangibles, net		—		188,329		675,081		—			863,410
Investments in affiliates and other noncurrent assets		1,837,883		3,169,830		33,656		(4,939,207	)		102,162

Total assets	$	1,838,280	$	3,744,706	$	3,411,264	$	(6,500,057	)	$	2,494,193


Accounts payable	$	—	$	326,996	$	126,158	$	—		$	453,154
Other current liabilities		99,528		37,080		91,072		—			227,680

Total current liabilities		99,528		364,076		217,230		—			680,834
Intercompany payables, net		554,257		1,006,593		—		(1,560,850	)		—
Long-term debt		164,679		348,952		84,238		—			597,869
Other noncurrent liabilities		23,527		192,661		3,013		—			219,201
Stockholders’ equity		996,289		1,832,424		3,106,783		(4,939,207	)		996,289

Total liabilities and stockholders’ equity	$	1,838,280	$	3,744,706	$	3,411,264	$	(6,500,057	)	$	2,494,193

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENTS OF INCOME


	Three Months Ended September 30, 2010
	(In thousands)
							Consolidating
	WESCO		WESCO				and
	International,		Distribution,		Non-Guarantor		Eliminating
	Inc.		Inc.		Subsidiaries		Entries			Consolidated

Net Sales	$	—	$	734,684	$	610,501	$	(20,630	)	$	1,324,555
Cost of goods sold		—		591,544		495,855		(20,630	)		1,066,769
Selling, general and administrative expenses		19		129,401		61,157		—			190,577
Depreciation and amortization		—		3,134		2,829		—			5,963
Results of affiliates’ operations		40,817		42,430		—		(83,247	)		—
Interest expense, net		7,137		4,129		2,482		—			13,748
Other income		—		—		—		—			—
Provision for income taxes		—		8,089		5,748		—			13,837


Net income	$	33,661	$	40,817	$	42,430	$	(83,247	)	$	33,661


	Three Months Ended September 30, 2009
	(In thousands)
										Consolidating
	WESCO			WESCO						and
	International,			Distribution,			Non-Guarantor			Eliminating
	Inc.			Inc.			Subsidiaries			Entries			Consolidated

Net Sales	$	—		$	767,537		$	384,890		$	—		$	1,152,427
Cost of goods sold		—			624,784			306,752			—			931,536
Selling, general and administrative expenses		20			131,880			36,409			—			168,309
Depreciation and amortization		—			4,990			1,420			—			6,410
Results of affiliates’ operations		28,148			36,328			—			(64,476	)		—
Interest expense, net		470			14,907			(1,778	)		—			13,599
Gain on debt exchange		(5,961	)		—			—			—			(5,961	)
Other income		—			(1,391	)		—			—			(1,391	)
Provision for income taxes		—			547			5,759			—			6,306


Net income	$	33,619		$	28,148		$	36,328		$	(64,476	)	$	33,619

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENTS OF INCOME


	Nine Months Ended September 30, 2010
	(In thousands)
								Consolidating
	WESCO		WESCO					and
	International,		Distribution,			Non-Guarantor		Eliminating
	Inc.		Inc.			Subsidiaries		Entries			Consolidated

Net Sales	$	—	$	2,095,135		$	1,690,249	$	(53,109	)	$	3,732,275
Cost of goods sold		—		1,685,105			1,372,125		(53,109	)		3,004,121
Selling, general and administrative expenses		141		383,376			176,075		—			559,592
Depreciation and amortization		—		9,244			8,440		—			17,684
Results of affiliates’ operations		102,459		112,174			—		(214,633	)		—
Interest expense, net		21,664		11,134			8,880		—			41,678
Other income		—		(4,284	)		—		—			(4,284	)
Provision for income taxes		—		20,275			12,555		—			32,830


Net income	$	80,654	$	102,459		$	112,174	$	(214,633	)	$	80,654


	Nine Months Ended September 30, 2009
	(In thousands)
										Consolidating
	WESCO			WESCO						and
	International,			Distribution,			Non-Guarantor			Eliminating
	Inc.			Inc.			Subsidiaries			Entries			Consolidated

Net Sales	$	—		$	2,387,898		$	1,103,334		$	—		$	3,491,232
Cost of goods sold		—			1,936,150			872,146			—			2,808,296
Selling, general and administrative expenses		24			406,714			118,920			—			525,658
Depreciation and amortization		—			15,189			4,737			—			19,926
Results of affiliates’ operations		78,522			100,539			—			(179,061	)		—
Interest expense, net		1,124			46,463			(7,638	)		—			39,949
Gain on debt exchange		(5,961	)		—			—			—			(5,961	)
Other income		—			(4,118	)		—			—			(4,118	)
Provision for income taxes		—			9,517			14,630			—			24,147


Net income	$	83,335		$	78,522		$	100,539		$	(179,061	)	$	83,335

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS


	Nine Months Ended September 30, 2010
	(In thousands)
	WESCO			WESCO						Consolidating
	International,			Distribution,			Non-Guarantor			and Eliminating
	Inc.			Inc.			Subsidiaries			Entries		Consolidated

Net cash provided (used) by operating activities	$	1,370		$	95,780		$	(21,653	)	$	—	$	75,497
Investing activities:
Capital expenditures		—			(9,835	)		(288	)		—		(10,123	)
Acquisition payments		—			(14,344	)		—			—		(14,344	)
Proceeds from sale of subsidiary		—			40,000			—			—		40,000
Collection of note receivable		—			15,000			—			—		15,000
Other		—			4,979			—			—		4,979

Net cash provided (used) by investing activities		—			35,800			(288	)		—		35,512
Financing activities
Net repayments		(2,577	)		(112,981	)		—			—		(115,558	)
Equity transactions		1,206			—			—			—		1,206
Other		—			(8,594	)		—			—		(8,594	)

Net cash used by financing activities		(1,371	)		(121,575	)		—			—		(122,946	)


Effect of exchange rate changes on cash and cash equivalents		—			—			2,728			—		2,728

Net change in cash and cash equivalents		(1	)		10,005			(19,213	)		—		(9,209	)
Cash and cash equivalents at the beginning of year		3			16,924			95,402			—		112,329

Cash and cash equivalents at the end of period	$	2		$	26,929		$	76,189		$	—	$	103,120


	Nine Months Ended September 30, 2009
	(In thousands)
	WESCO			WESCO						Consolidating
	International,			Distribution,			Non-Guarantor			and Eliminating
	Inc.			Inc.			Subsidiaries			Entries		Consolidated

Net cash (used) provided by operating activities	$	(39,415	)	$	300,348		$	29,921		$	—	$	290,854
Investing activities:
Capital expenditures		—			(9,900	)		(605	)		—		(10,505	)
Acquisition payments		—			(214	)		—			—		(214	)
Proceeds from sale of subsidiary		—			1,328			—			—		1,328
Other		—			111			—			—		111

Net cash used by investing activities		—			(8,675	)		(605	)		—		(9,280	)
Financing activities
Net repayments		38,942			(279,052	)		(1,148	)		—		(241,258	)
Equity transactions		479			—			—			—		479
Other		—			(11,122	)		(13,261	)		—		(24,383	)

Net cash provided (used) by financing activities		39,421			(290,174	)		(14,409	)		—		(265,162	)


Effect of exchange rate changes on cash and cash equivalents		—			—			8,595			—		8,595

Net change in cash and cash equivalents		6			1,499			23,502			—		25,007
Cash and cash equivalents at the beginning of year		—			18,453			67,885			—		86,338

Cash and cash equivalents at the end of period	$	6		$	19,952		$	91,387		$	—	$	111,345

Subsequent Event	9 Months Ended
Subsequent Event	Sep. 30, 2010
Subsequent Event [Abstract]
SUBSEQUENT EVENT	13. SUBSEQUENT EVENT Pursuant to the indenture governing the 2025 Debentures, holders had the right to require WESCO to repurchase all or a portion of their 2025 Debentures on October 15, 2010 at a cash repurchase price equal to 100% of the principal amount of the 2025 Debentures, plus accrued and unpaid interest. Holders elected to surrender an incidental amount for repurchase, leaving the outstanding balance of the 2025 Debentures essentially unchanged at $92.3 million.